利用RLC串联谐振电路测量金属丝的杨氏模量

摘要

In this paper,on the basis of RLC series resonant circuit,solenoid with iron core and resistor,capacitor are connected to be a RLC series oscillating circuit,then we connect the solenoid core and steel wire,and vertically hang them,add and subtract weight at the bottom of the iron core of solenoid,and then measure the solenoid inductor changes with iron core to characterize small displacement. The device can be used to indirectly measure the Young 's modulus. The measuring principle is simple and the error is small,it is a new feasible method for measuring Young's modulus.%以RLC串联谐振电路为基础,将带有铁芯的螺线管与电阻、电容串联起来组成RLC振荡电路,再将螺线管的铁芯和钢丝相连并竖直挂起来,在螺线管的铁芯下方加减砝码,通过测量带铁芯的螺线管电感的变化来表征微小位移的变化.利用该装置可以间接测量出钢丝杨氏模量,测量原理简单,误差较小,是一种测量杨氏模量可行的新方法.